2-propanol derivatives

ABSTRACT

A COMPOUND HAVING THE FORMULA   R-O-CH2-CH(-OOC-R1)-CH2-A   WHEREIN R IS AN ALKYL RADICAL WITH 1 TO 5 CARBON ATOMS AN ALKENYL RADICAL, AN ALKYNYL RADICAL, OR AN ARYLALKYL RADICAL, R1 IS PHENYL, A METHOXYPHENYL, PYRIDYL, FURYL, AN ARYLALKYL RADICAL, OR AN ARYLALKENYL RADICAL, AND A IS MORPHOLINO, N-METHYLPIPERAZINYL, OR N-BENZYLPIPERAZINYL, THE COMPOUND HAS CORONARO-DILATORY AND ANTIARRHYTHMIC PROPERTIES.

United States Patent 3,790,569 2-PR0PAN0L DERIVATIVES Roland-Yves Mauvernay, Norbert Busch, Jacques Simond,

and Jacques Moleyre, all of Route de Marsat, 63 Riom, France No Drawing. Original application Aug. 1, 1968, Ser. No. 749,277, now abandoned. Divided and this application Aug. 23, 1971, Ser. No. 174,178

Int. Cl. 007d 23/00 US. Cl. 260247.2 B 4 Claims ABSTRACT OF THE DISCLOSURE A compound having the formula:

R0CH1-CH-CHQA wherein R is an alkyl radical with 1 to 5 carbon atoms, an alkenyl radical, an alkynyl radical, or an arylalkyl radical, R is phenyl, a methoxyphenyl, pyridyl, furyl, an arylalkyl radical, or an arylalkenyl radical, and A is morpholino, N-methylpiperazinyl, or N-benzylpiperazinyl. The compound has coronaro-dilatory and antiarrhythrnic properties.

CROSS-RELATED APPLICATION R is an aryl radical which may be substituted, or in particular, a branched aliphatic radical,

A is a secondary or tertiary amine radical in which the amine nitrogen carries one or two alkyl substituents, the secondary alcohol function being free in all cases, have a more or less pronounced antiarrhythmic action. However, these same known compounds have a B-blocking effect, which results, in addition to this antiarrhythmic and coronaro-dilating action, in hypotensive activity which is not desired in medicines of this type.

A search was therefore undertaken for compounds with a similar structure, possessing antiarrhythmic and coronaro-dilating action which would not result from this B-blocking effect and not be coupled with any hypotensive activity.

It has been noted, in the first place, that aminoalcohol having the above-mentioned Formula I but in which:

R is an alkyl radical with 1 to 5 carbon atoms, allyl, a propargyl radical or a benzyl radical with A being a tertiary amine group in a heterocycle, the secondary alcohol function remaining free, have practically no available therapeutic activity on the cardiovascular system.

On the other hand, it has been noted unexpectedly, in this latter class of compounds, that if the secondary alcohol function is esterified, a novel class is obtained in which all the members possess remarkable coron'arodilating and antiarrhythmic properties and are completely free of beta-blocking and hypotensive elfects.

This class can therefore be defined by the general formula:

in which R is a substituted or unsubstituted alkyl radical with 1 to 5 carbon atoms, allyl, propargyl, or benzyl,

A is a tertiary amine group in a heterocycle,

R is phenyl, mono-, dior trimethoxyphenyl, pyridyl, furyl, benzyl a-ethylbenzyl, a-acetoxybenzyl, or styryl.

The invention also contemplates the pharmaceutically acceptable acid addition salts of these compounds.

Listed below are a certain number of these compounds with their melting points.

Compound number R R; A Salts (F., C.)

4 CH3CHz-CHz-CH Difumarate, 193.

-N N-CHa 5 CH2=CH-CH2 QUE Same asabove Dichlorhydrate, 146.

6 CH3 Same as abovedo Dichlorhydrate, 186.

/CH-CH2 7 CHa .-..-(10 D 111 h t N m or ydra e, CH-CHr-CH2 8 0H; 0 CH3 Same as above- Chlorhydrate, 140.

CH-CHr- CH CH: l

O CHa 9 Same as above -do Chlorhydrate, 120.

The compounds according to the invention are prepared by esterifying the amino-alcohols of Formula I in which Rand A have the meanings according to the invention, by means of the acid chloride corresponding to the meaning of R in benzene medium and in the presence of a tertiary amine, preferabl triethylamine.

These amino-alcohols can themselves be obtained from epichlorohydrin, for example, using one of two methods described below:

Method A In cases where R is a phenyl group, the phenol corresponding to R is treated with epichlorohydrin in alkaline medium to obtain the 3-phenoxy, 1,2-epoxypropanes, and from this point on, method A is used.

As examples, the processes for the preparation of some of the compounds according to the invention are given below, using, respectively, method A for Examples 1, 2 and 3 and Method B for Example 4.

EXAMPLE I Synthesis of 4 [3 isoamyloxy, 2 (3,4,5 trimethoxy) benzoyloxyjpropyl tetrahydro 1,4-oxazine hydrochloride (Compound N. 1)

1st step: 3-isoamyloxy 1,2-epoxypropane.To a mixture of 176 g. (2 M) of isoamyl alcohol and 4 ml. of a solution of BF in anhydrous ether, were added,

with stirring, 278 g. (3 M) of epichlorohydrin while maintaining the temperature at approximately 45 C.

After the addition, the reaction was maintained for an additional hour at 60 C. It was then cooled and a solution of 160 g. of NaOH in pellets in'200 ml. H O was added while maintaining the temperature at approximately C. Stirring was continued for an additional 2 hours, the NaCl formed was filtered and the organic phase decanted.

Vacuum fractionation gave 142 g. of product. B.P. =67-68 C., n 1.4195.

2nd step: 4[3 isoamyloxy '2"hydro'x'y'jpropyl tetrahy 115.5 g. (0.5 M) of 4-[3-isoamyloxy, 2-hydroxy]tetrahydro 1,4-oxazine, 1..

750 ml. of anhydrous benzene 50.5 g. of triethylamine and 115.25 g. of (3,4,5-trimethoxy) benzoyl chloride.

The mixture was slowly brought to reflux, which was maintained for 4 hours. .After cooling, it was filtered, the solvent was stripped off under vacuum, the residue taken up in 4 N-HCl (in the cold) and the aqueous solution washed with ether. The aqueous solution was then treated with Na CO and the oil formed extracted with ether. It was dried over anhydrous Na SO and the solvent stripped off to obtain a highly 'viscous oily residue which p was taken up in 600 ml. of ethyl acetate; the required quantity of absolute ethanol, with HCl gas, was then added, affording the hydrochloride. After standing for several hours in the ice-box, it was filtered, and after recrystallization from anhydrous isopropyl alcohol and drying under vacuum at 60 C. to constant weight, 155 g. of product were obtained. Yield=67%, M.P.-= 145 C.

Clpercent cal'culated=7.67; N percent calculated=3.01, Clpercent found 7.66 N percent found: 3.01.

White crystalline powder, soluble in water and alcohol, very slightly soluble in ethyl acetate.

EXAMPLE 2 (METHOD A) Synthesis of 4 [3 propargyloxy, 2 (3,4,5 trimethoxy(benzoyloxy]propyl tetrahydro 1,4-oxazine hydrochloride (Compound N. 24)

(1) 3 propargyloxy, Z-hydroxy, l-chloropropane was prepared by adding 92.5 g. of epichlorohydrin ('1 M) to a mixture of 168 g. of propargyl alcohol (3 M) and 5 ml. of a 5% solution of BF in anhydrous ether, with stirring and while maintaining the temperature at 40 C. Stirring was continued for an additional hour at room temperature, 10 ml. of water were added, the organic phase separated and vacuum fractionated to obtain 110 g. of product. B.P. =103 C. Yield=75%.

(2) This product was then treated with NaOH to obtain the corresponding epoxide:

' To 148.5 g. (l M) of 3-propargyloxy, 2-hydroxy, 1- chloropropane, were added 52 g. of NaOH in pellets in 100 ml. H O while maintaining the temperature at 0 C. The reaction mixture was stirred for 2 hours, the NaCl formed filtered and the organic phase decanted. After vacuum fractionation, g. of product were obtained: -B.P. =54 C., n =1.44O. Yield=81%.

(3) This epoxide was treated with morpholine to obtain 4-(3-proparglyoxy, 2-hydroxy)propyl tetrahydro 1,4- oxazine under the following conditions:

To a solution of 66 g (0.5 M) of epoxide in ml. of absolute ethanol were added 48 g. (0.55 M) of morpholine; the temperature rose to approximately 40 C. and the reaction mixture was heated for one hour under reflux. After evaporation of the alcohol, the reaction mixture was vacuum fractionated to afford 75 g. of product: B.P. =116-117, n 1.486. Yield=70%.

(4) This was then esterified using (3,4,5-trimethoxy) benzoyl chloride to obtain the title product in the following manner:

To a solution of 25.1 g. (0.1 M) of the previously prepared amino-alcohol in ml. of anhydrous benzene and 15 ml. of triethylamine, were added, portionwise, 23 g. (0.1 M) of the finely ground acid chloride. The reaction mixture was then heated under reflux, with stirring, for 3 hours, the benzene solution washed with water, the solvent stripped off under vacuum, the residue taken up in ethyl acetate and absolute ethyl alcohol with HCl gas was added to obtain the hydrochloride as a white crystalline, water and alcohol soluble powder.

M.P.=150 C. HCl percent calculated=8.45. HCl found=8.30.

EXAMPLE 3 (METHOD A) Synthesis of 4-[3-benzyloxy, 2-(3,4,5-trimethoxy)benzoyloxy]propyl tetrahydro 1,4-oxazine fumarate (Compound N. 27)

This product was prepared according to the synthesis described for compound N. 24 in Example 2 above, except that steps (1) and (2.) were combined into a single one, due to the fact that it was not necessary, in this case, to isolate 3-benzyloxy, Z-hydroxy, l-chloropropane and that the corresponding epoxide was prepared directly in the following manner:

(1) To a mixture of 216 g. (2 M) of benzyl alcohol and 4 ml. of a 10% solution of BP in anhydrous ether,

were added, 'with stirring, 278 g. of epichlorohydrin while maintaining the temperature at approximately 45 C. After the addition, it was maintained for an additional hour at 60 C. It was then cooled and a solution of 160 g. of NaOH in pellets in 200 ml. H O was added.

After filtration, the organic phase was decanted and vacuum fractionated to afford 140 g. of 2-benzyloxy, 1,2- epoxypropane. B.P. =122l25 C. n =1.5l50.

(2) Proceeding as in step (3) for the synthesis of compound N. 24 in Example 2 above, 85 g. of the corresponding amino-alcohol were obtained from 82 g. if epoxide and 48 g. of morpholine. B.P. =164 C. 11 1.5235. Yield: 68%.

(3) Esterification using 3,4,5-trimethoxy benzoyl chloride was carried out in a manner similar to that described for the compound in Example 2. The fumarate was isolated, in this case, which, after recrystallization from absolute alcohol gave a white crystalline, water soluble powder.

M.P. 130 C. Fumaric acid percent ca1culated=20.6. Fumaric acid percent found=21.

propyl tetrahydro 1,4-oxazine hydrochloride (Compound N". 17)

carried out on dogs according to the following test method, have been collected.

The thorax was opened, under chloralose, by resection of the fifth right rib. A restraint gauge was sewn onto the right ventricle. Through an opening made in the right auricle, a catheter, having as large a diameter as possible, was introduced into the coronary sinus and was held in place through a ligature placed very near the auricle.

The coronary venous blood flowed into a spirometer, itself placed in a thermostatic tank, and then, without leaving this enclosure came into contact with a macro oxygen electrode (Beckman). It finally returned to the right jugular vein through a tube into which was inserted a fine catheter shunting blood over to a Technicon automatic analyzer where continuous determinations were carried out for total carbon dioxide and ammonia. Myocardium contractions, the D electrocardiogram, integrated coronary flow, blood pressure and P were recorded on a Beckman dynograph.

In this testing, the products were administered by the venous route, (external saphenous vein) as a slow injection over a 1 minute period. r

The table comprises also, the acute toxicity values for the compounds studied, which were evaluated using the Behrens & Karber method (Arch. F. Exp. Path, pharm. 177, 379, 1935).

Percent LD 50, Doses, Ventricular Compound rug/kg. mg./kg. Coronary Fre- Blood restraint number (P.O.) Lv. flow quency pressure gauge PO 2 134.6 4 13.2 111.2 159.4 5 155 12 129 143.5 135 2 128.6 125.3 56 124 188.5 5 1 42 1 4 1 2. 7 1 23. 5 1 58 2 149.6 121 128.2 124 1118 5 1 48 89 140 1 18 88 5 127.1 11.6 14.2 114.5 37 5 45 1 11 1 8. 6 31 5 13 1 1. 6 5. 6 1 18 1 31 5 55 1. 5 1 13 15 T 65 5 160.6 18.4 4.6 116.6 135.4 5 23.3 119.8 6.8 {17.3 129.5 5 66 13. 3 6. 5 14. 7 7O 5 64 1 13 144. 5 1 10 92 5 10 116. 5 l8. 5 125. 5 1 14.5 5 1138.5 17 128 15.5 1127.5 5 152 124.5 11 139 112.5 5 11 1 17 1 0. 6 1 4. 3 1 7 5 130.2 116.6 113.3 112 137.5 5 1143.5 11.5 127.9 123.5 12.5 5 1 17 16. 5 1 9 1 11 1 12 5 159.6 18 13.4 12.6 146 (1) 3-(4-nitro)phenoxy, 1,2 epoxypropane was first prepared:

A mixture of 185 g. (2. M) of epichlorohydrin, 139 g. of para-nitrophenol (1 M), g. of NaOH in pellets in 320 ml. H O was heated for 4 hours at 60 C. with stirring. The organic phase was decanted and crystallized from benzene. The product was recrystallized from 96 alcohol. M.P.-=58-60 C.

110 g. of epoxide were obtained (yield=60% (2) The aminol-alcohol was obtained as in steps (2) and (3) in the syntheses described for compound N. 24 in Example 2 and compound N. 27 in Example 3.

Thus, 120 g. of 4-[3-(4-nitro)phenoxy, Z-hydroxy] propyl tetrahydro 1,4-oxazine were obtained from 98 g. of epoxide and 48 g. of morpholine: M.P.=89-90 C. Yie1d=85%.

(3) Esterification with nicotinoyl chloride was carried out as in the preparation of compounds in the previous examples.

Thus, the corresponding hydrochloride was isolated as a white crystalline water and alcohol soluble powder.

M.P.-=145 C. HCl percent calculated=8.7. HCl percent found=8.8.

As indicated at the outset, these compounds possess coronaro-dilating and antiarrhythmic activity, with no accompanying hypotensive effect. This set of properties is illustrated in the table below, in which results from tests orally, as tablets, capsules, soluble granules, drops, syrup,

rectally, as suppositories or rectal capsules,

as injections, in the form of bottles of lyophilized powder or ampoules,

associated with the vehicles usually employedin such preparation. 7

The doses used are summarized in the following table:

Routes of ad- Unit Preferred ministration doses, mg. doses, mg.

Oral 50-100 75 Injectable.. 50-500 250 Rectal. -200 100 We claim:

1. A compound adapted to produce coronodilation and to provide anti-arrhythmic activity and having the formula:

wherein R is an alkyl radical with 1 to 5 carbon atoms, allyl, propargyl or benzyl, R is phenyl, mono, di, or tri methoxyphenyl, pyridyl, furyl, benzyl, a ethylbenzyl, o: acetoxybenzyl, or styryl, and A is morpholino, N-methylpiperazinyl, or N-benzylpiperazinyl.

2. A compound as claimed in claim 1 wherein the methoxyphenyl radical of R is 3,4,5-trimethoxyphenyl.

3. A compound as claimed in claim 1 and having the formula:

4. A compound as claimed in claim 1 and having the formula:

OHa CHz-N N-CH3 CH-CHaO-CHz-OH 02115 5 C 1 or -ou O Q References Cited 10 UNITED STATES PATENTS 3,501,769 3/1970 Crowther et al. 260-501.17 3,379,761 4/1968 Wilhelm 260-570.7 3,394,171 7/1968 Thompson 260501.18

FOREIGN PATENTS 640,313 10/1963 Belgium.

HENRY R. JILES, Primary Examiner M. M. CROWDER, Assistant Examiner 20 US. 01. X. R.

260-240 I, 268 Ft; 424248, 268 H, 268 R 

